Where to lay pipes for controlled residential ventilation in the top floor ceiling

Ok I have a timber frame house. There are no slots to cut,...

Hi!

My GÜ strongly advised me against drilling holes in the upper ceiling because that also breaks the vapor barrier between the upper floor and the attic. To be honest, that made a lot of sense to me. How did you solve that?
And how do you prevent the ventilation system from freezing in winter? Your ventilation is therefore outside the thermal envelope, isn’t it? In our attic (we currently live in a house with a very similar construction to the one we are now building) I have measured down to minus 10°C in winter.

Best regards,

Andreas

By properly connecting the vapor barrier to the valves? They were there before the vapor barrier - and there are still more penetrations that need to be properly connected. I had written that the system on the attic is insulated with 50mm. And we probably won't have minus 10 degrees - the attic should remain frost-free due to the over-rafter insulation. But that wouldn't matter anyway, because the system is insulated. And it works anyway down to minus 15 degrees air temperature.

Hello everyone,
we are currently in the planning phase and were suggested the same approach as with .

I would be interested to know which device was installed.

Best regards
Alex

How is it with the [Aufsparrendämmung] and the moisture in the attic, is there still enough air exchange happening here?

Is it sensible, if one insulates the attic from above and does not heat it, to also use ventilation here?

Best regards
Alex

Yep, if you do it yourself, maybe the vapor barrier will also be tight... We're still planning back and forth, we're not quite decided yet. I would also prefer ceiling outlets upstairs instead of floor and wall outlets. So far, apart from the empty conduit for the 4 satellite cables and one power cable, we have no penetrations into the attic. I just checked the spec again. The operating range of a Helios controlled residential ventilation system does indeed go down to -20 °C, but the installation temperature (= ambient temperature of the device) must be above 5 °C. How else would you get rid of the condensate? So you have to be very sure that there is no frost in your attic, right? Or have you heated the condensate pipe?

Best regards,
Andreas